136342221 has 4 divisors (see below), whose sum is σ = 181789632. Its totient is φ = 90894812.

The previous prime is 136342211. The next prime is 136342231. The reversal of 136342221 is 122243631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (136342211) and next prime (136342231).

It is a cyclic number.

It is not a de Polignac number, because 136342221 - 2⁵ = 136342189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 136342191 and 136342200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136342201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22723701 + ... + 22723706.

It is an arithmetic number, because the mean of its divisors is an integer number (45447408).

Almost surely, 2^136342221 is an apocalyptic number.

It is an amenable number.

136342221 is a deficient number, since it is larger than the sum of its proper divisors (45447411).

136342221 is an equidigital number, since it uses as much as digits as its factorization.

136342221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45447410.

The product of its digits is 1728, while the sum is 24.

The square root of 136342221 is about 11676.5671753303. The cubic root of 136342221 is about 514.6873031848.

Adding to 136342221 its reverse (122243631), we get a palindrome (258585852).

The spelling of 136342221 in words is "one hundred thirty-six million, three hundred forty-two thousand, two hundred twenty-one".